Freescale Semiconductor
Technical Data
Low Voltage Dual 1:10 Differential
ECL/PECL Clock Fanout Buffer
The MC100ES6220 is a bipolar monolithic differential clock fanout buffer.
Designed for most demanding clock distribution systems, the MC100ES6220
supports various applications that require the distribution of precisely aligned
differential clock signals. Using SiGe technology and a fully differential
architecture, the device offers very low skew outputs and superior digital signal
characteristics. Target applications for this clock driver are high performance
clock distribution in computing, networking and telecommunication systems.
MC100ES6220
Rev 4, 04/2005
MC100ES6220
LOW VOLTAGE DUAL
1:10 DIFFERENTIAL ECL/PECL
CLOCK FANOUT BUFFER
Features
•
•
•
•
•
•
•
•
•
•
•
Two independent 1:10 differential clock fanout buffers
130 ps maximum device skew
SiGe technology
Supports DC to 1 GHz operation of clock or data signals
ECL/PECL compatible differential clock outputs
ECL/PECL compatible differential clock inputs
Single 3.3 V, –3.3 V, 2.5 V or –2.5 V supply
Standard 52-lead LQFP package with exposed pad for enhanced thermal
characteristics
Supports industrial temperature range
Pin and function compatible to the MC100EP220
52-lead Pb-free Package Available
Functional Description
TB SUFFIX
52-LEAD LQFP PACKAGE
EXPOSED PAD
CASE 1336A-01
AE SUFFIX
52-LEAD LQFP PACKAGE
Pb-FREE PACKAGE
CASE 1336A-01
The MC100ES6220 is designed for low skew clock distribution systems and
supports clock frequencies up to 1 GHz. The device consists of two independent
clock fanout buffers. The CLKA and CLKB inputs can be driven by ECL or PECL compatible signals. The input signal of each
clock buffer is distributed to 10 identical, differential ECL/PECL outputs. If VBB is connected to the CLKA or CLKB input and
bypassed to GND by a 10 nF capacitor, the MC100ES6220 can be driven by single-ended ECL/PECL signals utilizing the VBB
bias voltage output.
In order to meet the tight skew specification of the device, both outputs of a differential output pair should be terminated, even
if only one output is used. In the case where not all ten outputs are used, the output pairs on the same package side as the parts
being used on that side should be terminated.
The MC100ES6220 can be operated from a single 3.3 V or 2.5 V supply. As most other ECL compatible devices, the
MC100ES6220 supports positive (PECL) and negative (ECL) supplies. The MC100ES6220 is pin and function compatible to the
MC100EP220.
© Freescale Semiconductor, Inc., 2005. All rights reserved.
QA1
QA1
VCC
QB1
QB1
QB0
QA9
QB0
QA9
25
QB2
QA5
42
24
QB3
QA4
43
23
QB3
QA4
44
22
QB4
QA9
QA9
QA3
45
21
QB4
QA3
46
20
QB5
QB0
QB0
QA2
47
19
QB5
QA2
48
18
QB6
QA1
49
17
QB6
QA1
50
16
QB7
QA0
51
15
QB7
QA0
52
1
14
9 10 11 12 13
VCC
6
7
8
QB8
QB8
5
QB9
QB9
4
CLKB
VEE
3
CLKB
VCC
QB9
QB9
2
CLKA
VBB
QB8
QB8
MC100ES6220
CLKA
CLKB
CLKB
VEE
QA8
41
QB1
QB1
VCC
QA8
QB2
QA5
QA8
QA8
Fanout Buffer B
QA7
39 38 37 36 35 34 33 32 31 30 29 28 27
26
40
CLKA
CLKA
VEE
QA7
VCC
VEE
VCC
QA6
QA6
QA0
QA0
VCC
Fanout Buffer A
VBB
Figure 1. MC100ES6220 Logic Diagram
Figure 2. 52-Lead Package Pinout (Top View)
Table 1. Pin Configuration
Pin
I/O
Type
Function
CLKA, CLKA
Input
ECL/PECL
Differential reference clock signal input for fanout buffer A
CLKB, CLKB
Input
ECL/PECL
Differential reference clock signal input for fanout buffer B
QA[0-9], QA[0-9]
Output
ECL/PECL
Differential clock outputs of fanout buffer A
QB[0-9], QB[0-9]
Output
ECL/PECL
Differential clock outputs of fanout buffer B
VEE(1)
Supply
Negative power supply
VCC
Supply
Positive power supply. All VCC pins must be connected to the positive
power supply for correct DC and AC operation.
VBB
Output
DC
Reference voltage output for single ended ECL and PECL operation
1. In ECL mode (negative power supply mode), VEE is either –3.3 V or –2.5 V and VCC is connected to GND (0 V). In PECL mode (positive
power supply mode), VEE is connected to GND (0 V) and VCC is either +3.3 V or +2.5 V. In both modes, the input and output levels are
referenced to the most positive supply (VCC).
MC100ES6220
2
Advanced Clock Drivers Devices
Freescale Semiconductor
Table 2. Absolute Maximum Ratings(1)
Symbol
Characteristics
Min
Max
Unit
VCC
Supply Voltage
–0.3
3.6
V
VIN
DC Input Voltage
–0.3
VCC + 0.3
V
DC Output Voltage
–0.3
VCC + 0.3
V
±20
mA
VOUT
IIN
IOUT
TS
TFUNC
DC Input Current
±50
mA
–65
125
°C
TA = –40
TJ = +110
°C
DC Output Current
Storage Temperature
Functional Temperature Range
Condition
1. Absolute maximum continuous ratings are those maximum values beyond which damage to the device may occur. Exposure to these
conditions or conditions beyond those indicated may adversely affect device reliability. Functional operation at absolute-maximum-rated
conditions is not implied.
Table 3. General Specifications
Symbol
Characteristics
Min
Typ
Max
VCC – 2(1)
Unit
VTT
Output Termination Voltage
MM
ESD Protection (Machine Model)
200
V
HBM
ESD Protection (Human Body Model)
4000
V
CDM
ESD Protection (Charged Device Model)
2000
V
LU
Latch-Up Immunity
200
mA
CIN
Input Capacitance
θJA,θJC,
θJB
TJ
Thermal Resistance (junction-to-ambient,
junction-to-board, junction-to-case)
Operating Junction Temperature(2)
(continuous operation)
MTBF = 9.1 years
4.0
pF
See Table 8. Thermal Resistance
°C/W
0
Condition
V
110
Inputs
°C
1. Output termination voltage VTT = 0 V for VCC = 2.5 V operation is supported but the power consumption of the device will increase.
2. Operating junction temperature impacts device life time. Maximum continuous operating junction temperature should be selected according
to the application life time requirements (See application note AN1545 for more information). The device AC and DC parameters are
specified up to 110°C junction temperature allowing the MC100ES6220 to be used in applications requiring industrial temperature range. It
is recommended that users of the MC100ES6220 employ thermal modeling analysis to assist in applying the junction temperature
specifications to their particular application.
MC100ES6220
Advanced Clock Drivers Devices
Freescale Semiconductor
3
Table 4. PECL DC Characteristics (VCC = 2.5 V ± 5% or VCC = 3.3 V ± 5%, VEE = GND, TJ = 0°C to +110°C)
Symbol
Characteristics
Min
Typ
Max
Unit
Condition
0.1
1.3
V
Differential operation
1.0
VCC – 0.3
V
Differential operation
±150
µA
VIN = VIL or VIN = VIH
Clock Input Pair CLKA, CLKA, CLKB, CLKB (PECL differential signals)
VPP
VCMR
IIN
Differential Input Voltage(1)
Differential Cross Point
Input
Voltage(2)
Current(1)
Clock Inputs (PECL single ended signals)
VIH
Input Voltage High
VCC – 1.165
VCC – 0.880
V
VIL
Input Voltage Low
VCC – 1.810
VCC – 1.475
V
±150
µA
VIN = VIL or VIN = VIH
IIN
Input
Current(3)
PECL Clock Outputs (QA0-A9, QA0-A9, QB0-B9, QB0-B9)
VOH
Output High Voltage
VCC – 1.1
VCC – 1.005
VCC – 0.7
V
IOH = –30 mA(4)
VOL
Output Low Voltage
VCC – 1.9
VCC – 1.705
VCC – 1.4
V
IOL = –5 mA(4)
80
130
mA
VCC – 1.20
V
Supply current and VBB
IEE(5)
VBB
Maximum Quiescent Supply Current without
Output Termination Current
Output Reference Voltage
VCC – 1.42
VEE pins
IBB = 0.3 mA
1. VPP (DC) is the minimum differential input voltage swing required to maintain device functionality.
2. VCMR (DC) is the crosspoint of the differential input signal. Functional operation is obtained when the crosspoint is within the VCMR (DC)
range and the input swing lies within the VPP (DC) specification.
3. Input have internal pullup/pulldown resistors which affect the input current.
4. Termination 50 Ω to VTT.
5. ICC calculation: ICC = (number of differential output used) x (IOH + IOL) + IEE
ICC = (number of differential output used) x (VOH – VTT) ÷ Rload + (VOL – V TT) ÷Rload + IEE.
Table 5. ECL DC Characteristics (VEE = –2.5 V ± 5% or VEE = –3.3 V ± 5%, VCC = GND, TJ = 0°C to +110°C)
Symbol
Characteristics
Min
Typ
Max
Unit
Condition
1.3
V
Differential operation
Clock Input Pair CLKA, CLKA, CLKB, CLKB (ECL differential signals)
VPP
VCMR
IIN
Differential Input Voltage(1)
0.1
(2)
Differential Cross Point Voltage
VEE + 1.0
Input Current(1)
–0.3
V
Differential operation
±150
µA
VIN = VIL or VIN = VIH
V
Clock Inputs (ECL single ended signals)
VIH
Input Voltage High
–1.165
–0.880
VIL
Input Voltage Low
–1.810
–1.475
V
IIN
Input Current(3)
±150
µA
VIN = VIL or VIN = VIH
ECL Clock Outputs (QA0–A9, QA0–A9, QB0–B9, QB0–B9)
VOH
Output High Voltage
–1.1
–1.005
–0.7
V
IOH = –30 mA(4)
VOL
Output Low Voltage
–1.9
–1.705
–1.4
V
IOL = –5 mA(4)
80
130
mA
–1.20
V
Supply Current and VBB
IEE(5)
VBB
Maximum Quiescent Supply Current without
Output Termination Current
Output Reference Voltage
–1.42
VEE pins
IBB = 0.3 mA
1. VPP (DC) is the minimum differential input voltage swing required to maintain device functionality.
2. VCMR (DC) is the crosspoint of the differential input signal. Functional operation is obtained when the crosspoint is within the VCMR (DC)
range and the input swing lies within the VPP (DC) specification.
3. Input have internal pullup/pulldown resistors which affect the input current.
4. Termination 50 Ω to VTT.
5. ICC calculation: ICC = (number of differential output used) x (IOH + IOL) + IEE
ICC = (number of differential output used) x (VOH – VTT) ÷ Rload + (VOL – V TT) ÷ Rload + IEE.
MC100ES6220
4
Advanced Clock Drivers Devices
Freescale Semiconductor
Table 6. AC Characteristics (ECL: VEE = –3.3 V ± 5% or VEE = –2.5 V ± 5%, VCC = GND) or
(PECL: VCC = 3.3 V ± 5% or VCC = 2.5 V ± 5%, VEE = GND, TJ = 0°C to +110°C)(1)
Symbol
Characteristics
Min
Typ
Max
Unit
Condition
0.3
1.3
V
1.1
VEE + 1.1
VCC – 0.3
–0.3
V
V
0
1000
MHz
Differential
Propagation Delay CLKx to Qx0-9
285
550
ps
Differential
Differential Output Voltage (peak-to-peak)
400
Clock Input Pair CLKA, CLKA, CLKB, CLKB (PECL or ECL differential signals)
VPP
VCMR
fCLK
Differential Input Voltage(2) (peak-to-peak)
Differential Input Crosspoint
Voltage(3)
PECL
ECL
Input Frequency
PECL/ECL Clock Outputs (QA0-A9, QA0-A9, QB0-B9, QB0-B9)
tPD
VO(P-P)
tsk(O)
Output-to-Output Skew
tsk(PP)
Output-to-Output Skew (part-to-part)
tJIT(CC)
Output Cycle-to-Cycle Jitter
600
60
RMS (1σ)
(4)
tSK(P)
Output Pulse Skew
DCO
Output Duty Cycle
tr, tf
Output Rise/Fall Time
fREF < 0.1 GHz
fREF < 1.0 GHz
49.65
46.5
50
50
50
mV
130
ps
Differential
200
ps
Differential
1
ps
35
ps
50.35
53.5
%
%
DCREF = 50%
DCREF = 50%
350
ps
20% to 80%
1. AC characteristics apply for parallel output termination of 50 Ω to VTT.
2. VPP (AC) is the minimum differential ECL/PECL input voltage swing required to maintain AC characteristics including tPD and
device-to-device skew.
3. VCMR (AC) is the crosspoint of the differential ECL/PECL input signal. Normal AC operation is obtained when the crosspoint is within the
VCMR (AC) range and the input swing lies within the VPP (AC) specification. Violation of VCMR (AC) or VPP (AC) impacts the device
propagation delay, device and part-to-part skew.
4. Output pulse skew is the absolute difference of the propagation delay times: | tpLH – tpHL |.
Differential Pulse
Generator
Z = 50 Ω
Z = 50 Ω
Z = 50 Ω
RT = 50 Ω
DUT
MC100ES6220
RT = 50 Ω
VTT
VTT
Figure 3. MC100ES6220 AC Test Reference
CLKN
VPP = 0.8 V
VCMR = VCC – 1.3 V
CLKN
QX
QX
tPD (CLKN to QX)
Figure 4. MC100ES6220 AC Reference Measurement Waveform
MC100ES6220
Advanced Clock Drivers Devices
Freescale Semiconductor
5
APPLICATIONS INFORMATION
Understanding the Junction Temperature Range of the
MC100ES6220
To make the optimum use of high clock frequency and low
skew capabilities of the MC100ES6220, the MC100ES6220
is specified, characterized and tested for the junction
temperature range of TJ = 0°C to +110°C. Because the exact
thermal performance depends on the PCB type, design,
thermal management and natural or forced air convection,
the junction temperature provides an exact way to correlate
the application specific conditions to the published
performance data of this data sheet. The correlation of the
junction temperature range to the application ambient
temperature range and vice versa can be done by
calculation:
TJ = TA + Rthja ⋅ Ptot
Assuming a thermal resistance (junction to ambient) of
17°C/W (2s2p board, 200 ft/min airflow, see Table 8) and a
typical power consumption of 1049 mW (all outputs
terminated 50 ohms to VTT, VCC = 3.3 V, frequency
independent), the junction temperature of the MC100ES6220
is approximately TA + 18°C, and the minimum ambient
temperature in this example case calculates to –18°C (the
maximum ambient temperature is 92°C. See Table 7).
Exceeding the minimum junction temperature specification of
the MC100ES6220 does not have a significant impact on the
device functionality. However, the continuous use the
MC100ES6220 at high ambient temperatures requires
thermal management to not exceed the specified maximum
junction temperature. Please see the application note
AN1545 for a power consumption calculation guideline.
Maintaining Lowest Device Skew
The MC100ES6220 guarantees low output-to-output bank
skew of 100 ps and a part-to-part skew of max. 200 ps. To
ensure low skew clock signals in the application, both outputs
of any differential output pair need to be terminated
identically, even if only one output is used. When fewer than
all nine output pairs are used, identical termination of all
output pairs within the output bank is recommended. This will
reduce the device power consumption while maintaining
minimum output skew.
Power Supply Bypassing
The MC100ES6220 is a mixed analog/digital product. The
differential architecture of the MC100ES6220 supports low
noise signal operation at high frequencies. In order to
maintain its superior signal quality, all VCC pins should be
bypassed by high-frequency ceramic capacitors connected
to GND. If the spectral frequencies of the internally generated
switching noise on the supply pins cross the series resonant
point of an individual bypass capacitor, its overall impedance
begins to look inductive and thus increases with increasing
frequency. The parallel capacitor combination shown ensures
that a low impedance path to ground exists for frequencies
well above the noise bandwidth.
VCC
VCC
33...100 nF
0.1 nF
MC100ES6220
Figure 5. VCC Power Supply Bypass
Table 7. Ambient Temperature Ranges (Ptot = 1049 mW)
Rthja (2s2p board)
TA, min(1)
TA, max
Natural convection
20°C/W
–21°C
89°C
100 ft/min
18°C/W
–19°C
91°C
200 ft/min
17°C/W
–18°C
92°C
400 ft/min
16°C/W
–17°C
93°C
800 ft/min
15°C/W
–16°C
94°C
1. The MC100ES6220 device function is guaranteed from
TA = –40°C to TJ = 110°C.
MC100ES6220
6
Advanced Clock Drivers Devices
Freescale Semiconductor
APPLICATIONS INFORMATION
all units mm
package standoff 0.1 mm, a stencil thickness of 5 to 8 mils
should be considered.
all units mm
0.2
1.0
1.0
0.2
4.8
Using the Thermally Enhanced Package of the
MC100ES6220
The MC100ES6220 uses a thermally enhanced exposed
pad (EP) 52 lead LQFP package. The package is molded so
that the lead frame is exposed at the surface of the package
bottom side. The exposed metal pad will provide the low
thermal impedance that supports the power consumption of
the MC100ES6220 high-speed bipolar integrated circuit and
eases the power management task for the system design. A
thermal land pattern on the printed circuit board and thermal
vias are recommended in order to take advantage of the
enhanced thermal capabilities of the MC100ES6220. Direct
soldering of the exposed pad to the thermal land will provide
an efficient thermal path. In multilayer board designs, thermal
vias thermally connect the exposed pad to internal copper
planes. Number of vias, spacing, via diameters and land
pattern design depend on the application and the amount of
heat to be removed from the package. A nine thermal via
array, arranged in a 3 x 3 array and using a 1.2 mm pitch in
the center of the thermal land is a requirement for
MC100ES6220 applications on multi-layer boards. The
recommended thermal land design comprises a 3 x 3 thermal
via array as shown in Figure 6, providing an efficient heat
removal path.
4.8
Thermal via array (3x3),
1.2 mm pitch,
0.3 mm diameter
Exposed pad land
pattern
Figure 7. Recommended Solder Mask Openings
For thermal system analysis and junction temperature
calculation the thermal resistance parameters of the package
is provided:
4.8
Table 8. Thermal Resistance(1)
4.8
Thermal via array (3x3),
1.2 mm pitch,
0.3 mm diameter
Exposed pad
land pattern
Figure 6. Recommended thermal land pattern
The via diameter is should be approx. 0.3 mm with 1 oz.
copper via barrel plating. Solder wicking inside the via
resulting in voids during the solder process must be avoided.
If the copper plating does not plug the vias, stencil print solder
paste onto the printed circuit pad. This will supply enough
solder paste to fill those vias and not starve the solder joints.
The attachment process for exposed pad package is
equivalent to standard surface mount packages. Figure 7
shows a recommend solder mask opening with respect to the
recommended 3 x 3 thermal via array. Because a large solder
mask opening may result in a poor release, the opening
should be subdivided as shown in Figure 7. For the nominal
ConvectionL
FPM
RTHJA(2)
°C/W
RTHJA(3)
°C/W
Natural
20
48
100
18
47
200
17
46
400
16
43
800
15
41
RTHJC
°C/W
RTHJB(4)
°C/W
4(5)
29(6)
16
1. Applicable for a 3 x 3 thermal via array.
2. Junction to ambient, four conductor layer test board (2S2P),
per JES51-7 and JESD 51-5.
3. Junction to ambient, single layer test board, per JESD51-3.
4. Junction to board, four conductor layer test board (2S2P) per
JESD 51-8.
5. Junction to exposed pad.
6. Junction to top of package.
It is recommended that users employ thermal modeling
analysis to assist in applying the general recommendations
to their particular application. The exposed pad of the
MC100ES6220 package does not have an electrical low
impedance path to the substrate of the integrated circuit and
its terminals. The thermal land should be connected to GND
through connection of internal board layers.
MC100ES6220
Advanced Clock Drivers Devices
Freescale Semiconductor
7
PACKAGE DIMENSIONS
4X
4X 13 TIPS
0.2 H A-B D
0.2 C A-B D
D
PIN 1
INDEX
(0.2)
7
40
52
1
39
A
10
6
B
0.20
R 0.08
0.75
0.45
(1)
7˚
0˚
4
5
6
0.25
GAUGE PLANE
0.20
0.05
12
13
0˚ MIN 0.20
R 0.08
1.5
1.3
0.05
VIEW AA
6
4
27
X
14
26
5
X=A, B OR D
CL
6
B
6 4
10 6
48X
B
12 4
0.65
VIEW Y
H
4X
1.7 MAX
(12˚)
VIEW AA
8
BASE METAL
(0.3)
52X
0.1 C
8
J
C
SEATING
PLANE
0.40
52X
0.22 5
M
0.08
C A-B D
4X (12˚)
J
PLATING
0.20
0.09
0.16
0.07
0.35
0.20
8
8
SECTION B-B
NOTES:
1. DIMENSIONS ARE IN MILLIMETERS.
2. INTERPRET DIMENSIONS AND TOLERANCES PER
ASME Y14.5M, 1994.
3. DATUMS A, B AND D TO BE DETERMINED AT DATUM
PLANE H.
4. DIMENSION TO BE DETERMINED AT SEATING PLANE
C.
5. THIS DIMENSION DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR PROTRUSION
SHALL NOT CAUSE THE LEAD WIDTH TO EXCEED
0.46 mm. DAMBAR CANNOT BE LOCATED ON THE
LOWER RADIUS OR THE FOOT. MINIMUM SPACE
BETWEEN PROTRUSION AND ADJACENT LEAD
SHALL NOT BE LESS THAN 0.07 mm.
6. THIS DIMENSION DOES NOT INCLUDE MOLD
PROTRUSION. ALLOWABLE PROTRUSION IS 0.25mm
PER SIDE. THIS DIMENSION IS MAXIMUM PLSTIC
BODY SIZE DIMENSION INCLUDING MOLD MISMATCH.
7. EXACT SHAPE OF EACH CORNER IS OPTIONAL.
8. THESE DIMENSIONS APPLY TO THE FLAT SECTION
OF THE LEAD BETWEEN 0.10mm AND 0.25mm FROM
THE LEAD TIP.
4.78
4.58
4.78
4.58
EXPOSED PAD
VIEW Y
VIEW J-J
CASE 1336A-01
ISSUE O
52-LEAD LQFP PACKAGE
MC100ES6220
8
Advanced Clock Drivers Devices
Freescale Semiconductor
NOTES
MC100ES6220
Advanced Clock Drivers Devices
Freescale Semiconductor
9
NOTES
MC100ES6220
10
Advanced Clock Drivers Devices
Freescale Semiconductor
NOTES
MC100ES6220
Advanced Clock Drivers Devices
Freescale Semiconductor
11
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MC100ES6220
Rev. 4
04/2005
Information in this document is provided solely to enable system and software
implementers to use Freescale Semiconductor products. There are no express or
implied copyright licenses granted hereunder to design or fabricate any integrated
circuits or integrated circuits based on the information in this document.
Freescale Semiconductor reserves the right to make changes without further notice to
any products herein. Freescale Semiconductor makes no warranty, representation or
guarantee regarding the suitability of its products for any particular purpose, nor does
Freescale Semiconductor assume any liability arising out of the application or use of any
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limitation consequential or incidental damages. “Typical” parameters that may be
provided in Freescale Semiconductor data sheets and/or specifications can and do vary
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